Regular Expressions in Java and Perl
The two main classes of the java.util.regex API are Pattern and Matcher. In the tutorial, you start by creating a java file, RegexTestHarness.java, that can be used to read in different regular expressions from the file regex.txt. The regular expression read from regex.txt is compiled into a pattern using the compile method of the Pattern class; the pattern is used to find instances that match the regular expression using the matcher method of the same class.
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Arrays, Indexers, Collections, Array Lists, Strings, Regular Expressions
Array is an indexed collection of Objects all of the same type.
In C# the Array is an Object with useful methods and properties
An Array is used (declared) in similar way as native type (int, float etc.) which offers easy-to-use syntax
What you create is an Object of type System.Array
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Mastering Regular Expressions in .NET
Micr osoft’s .NET Framework, usable with Visual Basic, C#, and C++ (among other languages), offers a shared regular-expr ession library that unifies regex semantics among the languages. It’s a full-featured, powerful engine that allows you the maximum flexibility in balancing speed and convenience. Each language has a differ ent syntax for handling objects and methods, but those underlying objects and methods are the same regardless of the language, so even complex examples shown in one language directly translate to the other languages of the .NET language suite. Examples in this chapter are shown with Visual Basic.
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Regular Expressions in Visual Basic .NET
The .NET Framework comes with a very powerful regular expression engine that’s accessible from any .NET language, so you can leverage the parsing power of languages such as Perl without having to switch from your favorite language. The powerful .NET Framework regular expression engine allowed Microsoft to clean up the Visual Basic language by getting rid of regular expression- like (but far less versatile) features, such as the LIKE operator or the Replace string function. (The Replace function in the Microsoft.VisualBasic namespace is for backward compatibility only, and the String.Replace method supports only the replacement of single characters.)
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Insecure Context Switching Inoculating regular expressions for survivability
For most computer end-users, web browsers and Internet services act as the providers and protectors of their personal information, from bank accounts to personal correspondence. These systems are critical to users’ continued lifestyles but often show no evidence of survivability [45], or robustness against present and future attacks. Software defects, considered the largest risk to survivability [45], are quite prevalent in consumer products and Web service software components [12]. Recent widespread security issues [20] [19] serve to emphasize this fact and show a lack investment in survivability engineering practices [22] [23] [50] [53] that may have mitigated the risk.
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